World War1 By LiShonna Smith Jun 28, 1914 Assassination of Archduke Ferdinard Assassination of Archduke Ferdinard Jun 28, 1914 Austria-Hungary Declares War on Serbia Austria-Hungary Declares War on Serbia Aug 1, 1914 Germany Declares War on Russia. Germany Declares War on Russia. Aug 3, 1914 Germany declares war on France. (Germany declares war on France.)[https://www.history.com/this-day-in-history/germany-and-france-declare-war-on-each-other] Aug 4, 1914 World War I Begins World War I Begins Apr 22, 1915 Second Battle of Ypres Second Battle of Ypres Apr 22, 1915 Germans Fire Germans Fire May 7, 1915 Lusitania Sinks Lusitania Sinks Period: Feb 21, 1916 to Dec 18, 1916 Battle of Verdun Battle of Verdun Jul 1, 1916 Battle of the Somme Battle of the Somme Apr 9, 1917 Battle of Vimy Ridge Battle of Vimy Ridge Jul 31, 1917 Battle of Passchendaele Battle of Passchendaele Nov 11, 1918 Armistice Day Armistice Day Jun 28, 1919 Treaty of Versailles Treaty of Versailles